342 THE CANADIAN ENTOMOLOGIST 



Eyes hairy; frontal triangle shining black, short, ending in an 

 acute angle about the middle of the front; rest of front opaque, 

 blackish, the lower part sometimes indistinctly paler; antennae 

 black, third joint reddish on inner side, rather large and of very 

 characteristic shape, almost angulated above apically; arista bare; 

 epistoma and bucca varying from dark yellow to brown, the lat- 

 ter about one-fourth the eye-height; palpi black; proboscis small, 

 short, dark; occiput black. Thorax and scutellum above sub- 

 pollinose, gray, the black ground colour very evident, shining 

 through; the pollen of dorsum extends down over the hind part 

 of the mesopleura, and also behind the wing to the halter, which 

 is yellow; rest of pleura shining black; scutellum with a pair of 

 good-sized bristles at apex, and a much smaller pair outside and 

 higher. The mesonotum has short, stout, brown 

 hairs, rather scattered; in strong light they look 

 pale. Abdomen black above, generally more 

 brownish basally, with scattered pale hairs. Coxae, 

 femora and middle of hind tibiae black ; trochan- 

 ters, tips of femora, front and middle tibiae, all but 

 Fig.2i.— Oscinis middle of hind tibiae, and all tarsi to their tips, 



criddlei, antenna, ,, , 111 -itt- 1 i- • 1 



inner side. ycllow ; claws black. Wmgs hyahne, vems rather 



pale, venation ordinary; tip of second vein at 

 3/5 the distance from the first to the third. 

 Length \}/2 mm. 



Fifty-eight specimens, both sexes, all taken in July and 

 August at Treesbank and Aweme, Manitoba, by Norman Criddle, 

 in whose honour I name the species in appreciation of his active 

 and continued assistance in my work on flies of this family. 



Oscinis scabra, n. sp. 



An opaque gray, sh^rt, broad species allied to trigramma, but 

 not vittate. Front almost one-half the head-width, square, the 

 short, opaque triangle blending with the rest, lower half of front 

 yellow, slightly prominent above antennae, the whole surface 

 punctured except close about ocelli, the setae very short, hardly 

 visible; antennae yellow, third joint orbicular, infuscated on apical 

 half, arista short, bare; palpi yellow, proboscis small, retracted; 

 bucca yellow, one-third the eye-height; back of head opaque gray. 



